1. Factors affecting Reaction Rate影響反應速率的因素 29-3-2011

2. -Brainstorming Time- How does a reaction successfully happen? 一個化學反應怎樣成功發生？

3. Collision Theory碰撞理論 For a chemical reaction to occur, the reactant particles must collide with each other. It is so-called effective collision. 一個化學反應需要發生，反應物粒子必須互相碰撞。這被稱之為有效碰撞。

4. Collision Theory碰撞理論 Right Orientation 方位正確 High kinetic energy enough 足夠高的動能

5. B A A B + 有效碰撞 A B B A 產生生成物 A B B A A 反應物粒子 互相靠近 A A 無效碰撞 A B B B B 没有發生反應 Collision Theory碰撞理論 Therefore only small fraction of particles can produce effective collision. 因此只有少數粒子能產生有效碰撞。